i can tell you that when the put the wind mills on armenia mnt outside of troy last year, they had a meeting with the land owners. the wind mill company told them the transmission lines would be going under ground. this is what most people wanted.
then they put all the lines above ground.
turns out in there rol leases , there was a claus that said something to the effect of, if there were certain circumstances such as the ground being unsuiteable for under ground, they had the right to put them over head.
a lot of un happy people up there who felt they were tricked and that the wind mill company planned to do over head all along, just used smoke and mirrors to get leases signed.
just wanted to point that out in case it makes a differance to you weather it's above or under ground.